近日，北京大学周欢萍团队报道了高效蓝钙钛矿LED的原位纳米晶约束。该研究于2026年6月10日发表在《自然》杂志上。

金属卤化物钙钛矿因其优异的光致发光特性，已成为极具前景的发光二极管（LED）半导体材料。然而，其性能仍受到限制，主要原因是钙钛矿纳米晶在基底上原位合成过程中存在“高结晶性”与“小尺寸”之间的固有矛盾。

研究组通过原位聚合驱动的纳米晶限域策略，合成了由高质量纳米晶组成的钙钛矿薄膜，进而实现了高效的蓝光钙钛矿 LED（PeLED）。原位形成的聚合物网络在钙钛矿纳米晶生长过程中施加了纳米尺度的空间约束，从而获得了尺寸小且光致发光量子产率高达 83%的纳米晶。此外，具有充足配位点的可聚合单体能够延长钙钛矿团簇的晶格重排时间，从而提高了纳米晶的结晶性。

将所合成的钙钛矿纳米晶用于制备PeLED，在491 nm处实现了21.8%的外量子效率，这是蓝光 PeLED 的最高性能之一。该工作同时调控了钙钛矿结晶的热力学过程和有机配体反应，有助于加深对配体工程在纳米晶合成中作用的理解，从而推动高效 PeLED 及其他光电技术的发展。

附：英文原文

Title: In situ nanocrystal confinement for efficient blue perovskite LEDs

Author: Liu, Shaocheng, Pols, Mike, Zhang, Zhongyang, Huang, Xudan, Huang, Zijian, Han, Ying, Guo, Zhenyu, Li, Liang, Fan, Rundong, Zhang, De-Yi, Ping, Du, Yu, Wenjin, Gu, Jiazhen, Men, Luxuan, Dong, Hao, Tao, Shuxia, Wang, Lifen, Chen, Qi, Wang, Huan, Xu, Huaiyu, Sun, Ling-Dong, Yan, Chun-Hua, Zhou, Huanping

Issue&Volume: 2026-06-10

Abstract: Metal halide perovskites have emerged as promising semiconductors for light-emitting diodes (LEDs) owing to their excellent luminescence properties1. However, their performance remains limited, primarily owing to the inherent contradiction between ‘high crystallinity’ and ‘small size’ in the in situ synthesis of perovskite nanocrystals on substrates. Here we report efficient blue perovskite LEDs (PeLEDs) achieved via in situ polymerization-driven nanocrystal confinement to synthesize perovskite films composed of high-quality nanocrystals. The in situ-formed polymer network imposes nanoscale spatial constraints during perovskite nanocrystal growth, enabling nanocrystals with small sizes and a high photoluminescence quantum yield of 83%. Furthermore, polymerizable monomers with sufficient coordination sites allow a prolonged lattice rearrangement of perovskite clusters, promoting the crystallinity of the nanocrystals. The synthesized perovskite nanocrystals are utilized in the fabrication of PeLEDs, resulting in an external quantum efficiency of 21.8% at 491nm, which is among the highest performances in blue PeLEDs. This work simultaneously controls the thermal dynamics of perovskite crystallization and organic ligand reactions, which helps to advance understanding of the effect of ligand engineering on nanocrystal synthesis, benefiting the development of efficient PeLEDs and other optoelectronic technologies.

DOI: 10.1038/s41586-026-10596-3

Source: https://www.nature.com/articles/s41586-026-10596-3